<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        .con{
            display: flex;
            border: 1px solid red;
            /* 沿着主轴，从主轴的起始点开始排列 */
             /* justify-content: flex-start; */
             /* justify-content: flex-end; */
             /* justify-content: center; */
             /* justify-content: space-between; */
             justify-content: space-around;
        }
        .item{
            width: 200px;
            height: 300px;
            border: 1px solid rebeccapurple;
        }
    </style>
</head>
<body>
    <div class="con">
        <div class="item item1">
            1
        </div>
        <div class="item item2">
            2
        </div>
        <div class="item item3">
            3
        </div>
        <div class="item item4">
            4
        </div>
        <div class="item item5">
            5
        </div>
        <div class="item item6">
            6
        </div>
    </div>
</body>
</html>